pen_bag = ['笔', '尺子', '涂改液']
computer_bag = ['电脑', '鼠标']
bag_list = [pen_bag, computer_bag]

for bag in bag_list:
    for item in bag:
        print(item)

# 笔
# 尺子
# 涂改液
# 电脑
# 鼠标